the presence in the superficial dermis of dilated blood vessels surrounded by a thickened cuff of collagen IV. 1 The breast, primarily involved in our patient, is an unreported early localization of CCV. In addition, lesions are not said to be hypothermic in published cases.Hypothermic, telangiectatic patches on the breast should be separated mainly from naevus oligemicus, 7 a functional abnormality caused by localized vasoconstriction of the deep dermal vascular plexus. Telangiectatic metastatic breast carcinoma must also be considered in the differential diagnosis. 8 Other acquired diseases presenting with telangiectasias, including generalized essential telangiectasia, 9 TEMPI syndrome (telangiectasias, elevated erythropoietin and erythrocytosis, monoclonal gammopathy, perinephric fluid collections and intrapulmonary shunting), telangiectasia macularis eruptiva perstans, druginduced telangiectasias, radiodermitis, collagen vascular diseases, amyloidosis, angiotropic lymphoma and poikilodermatous mycosis fungoides should be distinguished from CCV. 10 Distribution of telangiectasias, age of onset, associated systemic features and histopathology aid in the diagnosis.Increased awareness of the clinical presentations of CCV could improve its recognition and understanding.
Controlling critical dimensions of devices is a constant battle for the photolithography engineer. Current DUV lithographic process exposure latitude is typically 12 to 15% of the total dose. A third of this exposure latitude budget may be used up by a variable related to masking that has not previously received much attention.The emphasis on pellicle transmission has been focussed on increasing the average transmission. Much less, attention has been paid to transmission uniformity. This paper explores the total demand on the photospeed latitude budget, the causes of pellicle transmission nonuniformity and examines reasonable expectations for pellicle performance. Modeling is used to examine how the two primary errors in pellicle manufacturing contribute to nonuniformity in transmission.World-class pellicle transmission uniformity standards are discussed and a comparison made between specifications of other components in the photolithographic process. Specifications for other materials or parameters are used as benchmarks to develop a proposed industry standard for pellicle transmission uniformity.
The cover image is based on the Original Research Discovery of novel molecular characteristics and cellular biological properties in ameloblastoma by Sayuri Kondo et al., https://doi.org/10.1002/cam4.2931.
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